Network

Link servers behind BungeeCord or Velocity (lobby, Skyblock, Survival...). Off by default.

What you get

• A player enters his inviter once, on any server, and it counts everywhere; the inviter is found even if he never played there.
• Playtime checks use the time played on the whole network.
• Messages reach the player on the server he is on.
• Every reward can be limited to some servers; it waits until the player joins one of them.
• A reward can't be given twice, not even when two servers try at the same moment.

Install FlareReferrals on every game server (lobby too), not on the proxy.

storage:
  type: mysql
  mysql:
    host: 10.0.0.5
    port: 3306
    database: flarereferrals
    username: referrals
    password: "secret"

network:
  enabled: true
  server-name: lobby       # skyblock on Skyblock, survival on Survival... (different on every server)
  rewards-here: false      # lobby: saves invites, gives no rewards. true on the game servers
  sync-seconds: 3

Start the servers: the console shows Storage: mysql | Network: on as lobby.

Servers that already have data: on the first server /referrals migrate mysql then ... confirm; on every other server /referrals migrate mysql merge then ... merge confirm. Stop the servers already using the database before a merge, then restart all of them.

Rewards per server (rewards.yml, or the compass button in the reward menu):

milestones:
  '10':
    servers: [skyblock]           # [all] = any server that gives rewards